使用DigestUtils类中的sha256Hex方法报错NoSuchMethodError: No static method encodeHexString([B)

异常

Process: com.xxx.xxx, PID: 29762
 java.lang.NoSuchMethodError: No static method encodeHexString([B)Ljava/lang/String; in class Lorg/apache/commons/codec/binary/Hex; or its super classes (declaration of 'org.apache.commons.codec.binary.Hex' appears in /system/framework/org.apache.http.legacy.boot.jar)
 	at com.xxx.xxx.fragment.ProfileFragment.generateBackupPassword(ProfileFragment.java:76)
 	at com.xxx.xxx.fragment.ProfileFragment.updateBackupPassword(ProfileFragment.java:65)
 	at com.xxx.xxx.fragment.ProfileFragment.onViewCreated(ProfileFragment.java:56)
 	at androidx.fragment.app.Fragment.performViewCreated(Fragment.java:2987)
 	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:546)
 	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:282)
 	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
 	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
 	at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1971)
 	at androidx.fragment.app.BackStackRecord.commitNow(BackStackRecord.java:305)
 	at androidx.viewpager2.adapter.FragmentStateAdapter.placeFragmentInViewHolder(FragmentStateAdapter.java:342)
 	at androidx.viewpager2.adapter.FragmentStateAdapter.onViewAttachedToWindow(FragmentStateAdapter.java:273)
 	at androidx.viewpager2.adapter.FragmentStateAdapter.onViewAttachedToWindow(FragmentStateAdapter.java:73)
 	at androidx.recyclerview.widget.RecyclerView.dispatchChildAttached(RecyclerView.java:8377)
 	at androidx.recyclerview.widget.RecyclerView$5.addView(RecyclerView.java:954)
 	at androidx.recyclerview.widget.ChildHelper.addView(ChildHelper.java:107)
 	at androidx.recyclerview.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:9430)
 	at androidx.recyclerview.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:9388)
 	at androidx.recyclerview.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:9375)
 	at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1676)
 	at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1622)
 	at androidx.recyclerview.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1425)
 	at androidx.recyclerview.widget.LinearLayoutManager.scrollHorizontallyBy(LinearLayoutManager.java:1145)
 	at androidx.recyclerview.widget.RecyclerView.scrollStep(RecyclerView.java:2047)
 	at androidx.recyclerview.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:5835)
 	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
 	at android.view.Choreographer.doCallbacks(Choreographer.java:723)
 	at android.view.Choreographer.doFrame(Choreographer.java:655)
 	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
 	at android.os.Handler.handleCallback(Handler.java:790)
 	at android.os.Handler.dispatchMessage(Handler.java:99)
 	at android.os.Looper.loop(Looper.java:164)
 	at android.app.ActivityThread.main(ActivityThread.java:6494)
 	at java.lang.reflect.Method.invoke(Native Method)
 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

错误代码

String password = DigestUtils.sha256Hex(basePassword + backupId).substring(0, 12);

原因

据查找的资料说Android 系统内置的旧版 Apache Commons Codec 库缺少 encodeHexString() 方法，并且内置系统库拥有更高的优先级，所以即使更新版本也无法使用。

解决

我的解决方法是把用到的这两个类复制到我自己项目下，原代码不变，注意修改DigestUtils类中调用Hex类的包路径。同样原调用DiagestUtils类的包路径也要注意修改为自己包下的路径。

参考资料

• NoSuchMethodError异常处理之特殊处理方式
• declaration of ‘org.apache.commons.codec.binary.Hex‘ appears in /system/framework/ext.jar